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  1. #1
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    Default Datasheet 18f27/47k40 errors

    Over the last 2 weeks been reading the 27k40 /47k40 datasheets

    i was looking to design with the 47k40 with TQFN 44 package

    I have found the Pin allocation table ( table 2 ) does not match the diagrams for each pin in either the TQFN / QFN packages ,
    also the n/c pins are not shown in the Pin allocation table
    working from the pin allocation table finds that pins 33,34 are not connected for 44 pin packages

    have raised a case with microchip to check , but it will some time before its looked at
    here are the following discrepancies between the pin allocation table and Figures 5,6 of the 44 pin packages , if i missed something please let me know


    following are the discrepancies between the pin allocation table and the chip shown on FIG5, FIG6

    N/C - FIG 5,6 = PIN 31
    RA6 - PIN ALLOCATION - TABLE 2 = PIN 31,
    RA6 - FIG 5,6 = PIN 33,
    N/C - PIN ALLOCATION - TABLE 2 = PIN 33 ( pin not shown in table thus Must be N/C pin ),

    RA7 - PIN ALLOCATION - TABLE 2 = PIN 30,
    RA7 - FIG 5,6 = PIN 32

    N/C - FIG 5,6 = PIN 8
    RB0 - PIN ALLOCATION - TABLE 2 = PIN 8
    RB0 - FIG 5,6 = PIN 9

    RB1 - PIN ALLOCATION - TABLE 2 = PIN 9
    RB1 - FIG 5,6 = PIN 10

    RB2 - PIN ALLOCATION - TABLE 2 = PIN 10
    RB2 - FIG 5,6 = PIN 11

    RB3 - PIN ALLOCATION - TABLE 2 = PIN 11
    RB3 - FIG 5,6 = PIN 12

    RC0 - PIN ALLOCATION - TABLE 2 = PIN 32
    RC0 - FIG 5,6 = PIN 34
    N/C - PIN ALLOCATION - TABLE 2 = PIN 34 ( pin not shown in table thus Must be N/C pin )

    RC1 - PIN ALLOCATION - TABLE 2 = PIN 32
    RC1 - FIG 5,6 = PIN 35

    RC2 - PIN ALLOCATION - TABLE 2 = PIN 32
    RC2 - FIG 5,6 = PIN 35

    RD0 - PIN ALLOCATION - TABLE 2 = PIN 38
    RD0 - FIG 5,6 = PIN 39

    RD1 - PIN ALLOCATION - TABLE 2 = PIN 39
    RD1 - FIG 5,6 = PIN 38


    i have attached the datasheet details for checking
    Name:  47k40 tqfn.JPG
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Size:  60.9 KBName:  47k40 qfn.JPG
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    Name:  47k40 pin alloaction table part a.JPG
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Size:  122.0 KBName:  47k40 pin alloaction table part b.JPG
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  2. #2
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    Default Re: Datasheet 18f27/47k40 errors

    new datasheet released it seems , had pickup these errors by the looks

  3. #3
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    Default Re: Datasheet 18f27/47k40 errors

    new errata for 18f27/47k40 chips today

  4. #4

    Default Re: Datasheet 18f27/47k40 errors

    Which one is that?

    The only one I see is PIC18F27-47K40-Silicon-Errata-and-Data-Sheet-Clarification-80000713E.pdf dated May 1

  5. #5
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    Default Re: Datasheet 18f27/47k40 errors

    sorry yes my copy was the older version of errata

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